What do you think of the possibility that the 1150 at the front of the serial number stands for Nov 1950? I've never looked into the newer walk behinds but the riders in both Red E and Page with this style tag seems to follow that the first numbers are the year. They don't use the month though, at least the ones I've checked. Adam, can you check some of your tag numbers against the engine numbers and see if they are anywhere close?

That actually did cross my mind as a possiblity since that is how Briggs and Stratton does their dating. Seems like an interesting conincidene that your number is the same starting layout and lines up with the engine year. I might just stick with this theory for now and call it a 1950 unless someone can come up with a better explanation. Thanks for all your help guys, this is great.

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Those are too small to see. Do those tractors have the original engines that could be checked date wise too? The more samples we can test the theory against, the better we can see if we are close or just wishful thinking. maybe we should move these posts into its own thread so we don't hijack this one and then we can pin it for more samples?